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DCOIT Specification

Active Ingredient 98% min.
Appearance Light Yellow Powder

DCOIT Physical And Chemical Properties

Chemical Name 4,5-dichloro-2-n-octyl-4-isothiazoline-3-one
Empirical Formula C11H17NOSCl2
CAS No. 64359-81-5
Molecular Weight 282.00
Structural Formula DCOIT structure formula
Melting point 40 °C
Solubility Soluble in water 2ppm ( 25°C )

DCOIT Application


DCOIT is ideally suited for outdoor applications with its best-in-class antifungal performance in standing up to UV radiation and rainwater leaching. Recommended active ingredient concentration in polymers: 800 ppm - 2000 ppm.

DCOIT-10: A fungicide for interior/exterior plastics. DCOIT-10 is a 10% solution of 4,5-dichloro-2-n-octyl-4-isothiazoline-3-one in a plasticier carrier. It is a both bactericide and fungicide and offers highly effective.

DCOIT biocide contains the active ingredient 4,5-dichloro-2-n-octyl-4- isothiazoline-3-one (DCOIT) , which both effectively controls bacteria that cause architectural paints and coatings to degrade in the can and prevents mildew growth after the films dry. At the same time, DCOIT industrial microbicide has low water solubility, making it very resistant to being leached from the paint film by ambient moisture. What's more, DCOIT does not have the same environmental and toxicity issues associated with mercury-based biocides

DCOIT controls a wide range of microorganisms, including fungi, algae and bacteria. As far as fungi are concerned, this isothiazolinone product inhibits the growth of many species at low use levels. Its efficacy against Aureobasidium pullulans (the fungus predominantly responsible for the development of mildew in exterior paints) is particularly noteworthy. Equally important from the stand point of in-can protection, this biocide also is very effective against the bacteria, especially the Pseudomonas species, that attack paints, joint compounds, roof coatings, exterior insulating and finishing systems (EIFS), and clear finishes in the can.

In addition to its impressive antimicrobial capabilities, DCOIT has a number of other appealing features for formulators. Because of its isothiazolinone chemistry, it is non-persistent in the environment, breaking down readily into harmless compounds. In addition, this biocide does not release formaldehyde, does not require zinc oxide for mildewcide stability and is easily incorporated into paint and coatings formulations. The new biocide can be used in both latex- and solventborne paints. With all its performance benefits, DCOIT exacts no appearance or performance penalty. This compound will not cause a paint film to yellow, will not destabilize a paint or detract from its tint retention and is EPA-registered for use in coatings.

All laboratories involved in the study obtained similar results for the PVC foils protected with DCOIT.

DCOIT Quotation Form

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